<table style="width: 490px; border-collapse: collapse;">
    <tr>
        <td style="border: 1px solid #ccc; padding: 8px; word-wrap: break-word;">单元格内容</td>
        <td style="border: 1px solid #ccc; padding: 8px; word-wrap: break-word;">单元格内容</td>
        <td style="border: 1px solid #ccc; padding: 8px; word-wrap: break-word;">单元格内容</td>
        <td style="border: 1px solid #ccc; padding: 8px; word-wrap: break-word;">单元格内容</td>
    </tr>
    <tr>
        <td style="border: 1px solid #ccc; padding: 8px; word-wrap: break-word;">单元格内容</td>
        <td style="border: 1px solid #ccc; padding: 8px; word-wrap: break-word;">单元格内容</td>
        <td style="border: 1px solid #ccc; padding: 8px; word-wrap: break-word;">单元格内容</td>
        <td style="border: 1px solid #ccc; padding: 8px; word-wrap: break-word;">单元格内容</td>
    </tr>
</table>